ATMEGA325-16AJ ATMEL [ATMEL Corporation], ATMEGA325-16AJ Datasheet - Page 73

• Manufacturer Part Number: ATMEGA325-16AJ
• Description: 8-bit Microcontroller with In-System Programmable Flash
• Manufacturer: ATMEL [ATMEL Corporation]

Register Description for I/O-Ports
Port A Data Register
– PORTA
Port A Data Direction Register
– DDRA
Port A Input Pins Address
– PINA
Port B Data Register
– PORTB
Port B Data Direction Register
– DDRB
Port B Input Pins Address
– PINB
Port C Data Register
– PORTC
Port C Data Direction Register
– DDRC
Port C Input Pins Address
– PINC
2570A–AVR–09/04
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
PORTB7
PORTC7
PORTA7
PINA7
PINB7
PINC7
DDB7
DDC7
DDA7
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
N/A
N/A
N/A
7
0
7
0
7
7
0
7
0
7
7
0
7
0
7
PORTB6
PORTC6
PORTA6
PINA6
PINB6
PINC6
DDB6
DDC6
DDA6
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
N/A
N/A
N/A
6
0
6
0
6
6
0
6
0
6
6
0
6
0
6
PORTA5
PORTB5
PORTC5
PINA5
PINB5
PINC5
DDA5
DDB5
DDC5
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
N/A
N/A
N/A
5
0
5
0
5
5
0
5
0
5
5
0
5
0
5
ATmega325/3250/645/6450
PORTA4
PORTB4
PORTC4
PINA4
PINB4
PINC4
DDA4
DDB4
DDC4
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
N/A
N/A
N/A
4
0
4
0
4
4
0
4
0
4
4
0
4
0
4
PORTA3
PORTB3
PORTC3
PINA3
PINB3
PINC3
DDA3
DDB3
DDC3
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
N/A
N/A
N/A
3
0
3
0
3
3
0
3
0
3
3
0
3
0
3
PORTA2
PORTB2
PORTC2
PINA2
PINB2
PINC2
DDA2
DDB2
DDC2
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
N/A
N/A
N/A
2
0
2
0
2
2
0
2
0
2
2
0
2
0
2
PORTA1
PORTB1
PORTC1
PINA1
PINB1
PINC1
DDA1
DDB1
DDC1
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
N/A
N/A
N/A
1
0
1
0
1
1
0
1
0
1
1
0
1
0
1
PORTA0
PORTB0
PORTC0
PINA0
PINB0
PINC0
DDA0
DDB0
DDC0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
N/A
N/A
N/A
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
PORTA
PORTB
PORTC
DDRA
DDRB
DDRC
PINA
PINB
PINC
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